xen: use PTE_MASK in pte_mfn()
Use PTE_MASK to extract mfn from pte.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Tested-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/asm-x86/xen/page.h b/include/asm-x86/xen/page.h
index 0179930..baf3a4d 100644
--- a/include/asm-x86/xen/page.h
+++ b/include/asm-x86/xen/page.h
@@ -127,7 +127,7 @@
static inline unsigned long pte_mfn(pte_t pte)
{
- return (pte.pte & ~_PAGE_NX) >> PAGE_SHIFT;
+ return (pte.pte & PTE_MASK) >> PAGE_SHIFT;
}
static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot)